asn.dev

Observed topology

AS4557 SOUTHEAST-TEXAS-GIGAPOP

Education ARIN

Upstreams 5 carry this network
Downstreams 14 this network carries
Adjacent (IPv4) 19
Adjacent (IPv6) 9
Upstream graph Who carries AS4557, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS4557 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS4557: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS6461Zayo BandwidthTransitIPv4 IPv6171
AS1299Arelion Sweden ABTransitIPv4 IPv6107
AS6939Hurricane Electric LLCTransitIPv4 IPv662
AS2914NTT America, Inc.TransitIPv448
AS16905LEARNUnclassifiedIPv4 IPv68

Transit

Downstream networks

All 14

Networks for which AS4557 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS25977HOUSTON COMMUNITY COLLEGE SYSTEMUnclassifiedIPv42,594
AS30049Metropolitan Transit Authority of Harris CountyUnclassifiedIPv4970
AS8Rice UniversityUnclassifiedIPv4 IPv6205
AS5707The University of Texas Health Science Center at HoustonEducationIPv4171
AS302Baylor College of MedicineUnclassifiedIPv4 IPv6125
AS7276University of HoustonEducationIPv4 IPv6115
AS3634Stephen F. Austin State UniversityEducationIPv4 IPv6111
AS20099Houston Museum of Natural ScienceUnclassifiedIPv4 IPv683
AS23030University of Houston - DowntownUnclassifiedIPv460
AS394324Pearland Independent School DistrictUnclassifiedIPv458

All 14 downstreams →

Adjacency

Adjacent networks

All 19

Every AS seen directly next to AS4557 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS25977HOUSTON COMMUNITY COLLEGE SYSTEMUnclassifiedIPv42,594
AS6461Zayo BandwidthTransitIPv4 IPv61,583
AS1299Arelion Sweden ABTransitIPv4 IPv61,325
AS30049Metropolitan Transit Authority of Harris CountyUnclassifiedIPv4970
AS6939Hurricane Electric LLCTransitIPv4 IPv6935
AS2914NTT America, Inc.TransitIPv4848
AS16905LEARNUnclassifiedIPv4 IPv6459
AS8Rice UniversityUnclassifiedIPv4 IPv6221
AS5707The University of Texas Health Science Center at HoustonEducationIPv4171
AS302Baylor College of MedicineUnclassifiedIPv4 IPv6161

All 19 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.